rust-clippy/tests/ui/range_plus_minus_one.rs

#![feature(tool_lints)]

fn f() -> usize {
    42
}

#[warn(clippy::range_plus_one)]
fn main() {
    for _ in 0..2 { }
    for _ in 0..=2 { }

    for _ in 0..3+1 { }
    for _ in 0..=3+1 { }

    for _ in 0..1+5 { }
    for _ in 0..=1+5 { }

    for _ in 1..1+1 { }
    for _ in 1..=1+1 { }

    for _ in 0..13+13 { }
    for _ in 0..=13-7 { }

    for _ in 0..(1+f()) { }
    for _ in 0..=(1+f()) { }

    let _ = ..11-1;
    let _ = ..=11-1;
    let _ = ..=(11-1);
    let _ = (1..11+1);
    let _ = (f()+1)..(f()+1);

    let mut vec: Vec<()> = std::vec::Vec::new();
    vec.drain(..);
}